The Windows Distributed interNet Applications Architecture is a Microsoft blueprint for robust, scalable, distributed business software. Windows DNA was not preplanned architecture and it was developed in between. It have all combined advantages of Centralized mainframe, application servers, internet technologies and Personal computers. Windows DNA is was started from mainframes in which all logic was centralized.

Windows DNA has been largely superseded by the Microsoft .NET Framework, and Microsoft no longer uses the term.

A master page is a template for other pages, which shares design and functionality with other pages. The master page provide a content place holder for other pages.

Web user control is a unit of functionality, which incorporate into parent page. it does not give a template design and functionality as master page gives. .NET provide .ascx extension for user control.